DefaultServletpublic class DefaultServlet extends HttpServlet | The default resource-serving servlet for most web applications,
used to serve static resources such as HTML pages and images. |
| Fields Summary |
|---|
| protected int | debugThe debugging detail level for this servlet. | | protected int | inputThe input buffer size to use when serving resources. | | protected boolean | listingsShould we generate directory listings? | | protected boolean | readOnlyRead only flag. By default, it's set to true. | | protected int | outputThe output buffer size to use when serving resources. | | protected static org.apache.catalina.util.URLEncoder | urlEncoderArray containing the safe characters set. | | protected String | localXsltFileAllow customized directory listing per directory. | | protected String | globalXsltFileAllow customized directory listing per instance. | | protected String | readmeFileAllow a readme file to be included. | | protected org.apache.naming.resources.ProxyDirContext | resourcesProxy directory context. | | protected String | fileEncodingFile encoding to be used when reading static files. If none is specified
the platform default is used. | | protected int | sendfileSizeMinimum size for sendfile usage in bytes. | | protected static ArrayList | FULLFull range marker. | | protected static final String | mimeSeparationMIME multipart separation string | | protected static final String | RESOURCES_JNDI_NAMEJNDI resources name. | | protected static org.apache.catalina.util.StringManager | smThe string manager for this package. | | protected static final int | BUFFER_SIZESize of file transfer buffer in bytes. |
| Methods Summary |
|---|
| protected boolean | checkIfHeaders(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.ResourceAttributes resourceAttributes)Check if the conditions specified in the optional If headers are
satisfied.
return checkIfMatch(request, response, resourceAttributes)
&& checkIfModifiedSince(request, response, resourceAttributes)
&& checkIfNoneMatch(request, response, resourceAttributes)
&& checkIfUnmodifiedSince(request, response, resourceAttributes);
| | protected boolean | checkIfMatch(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.ResourceAttributes resourceAttributes)Check if the if-match condition is satisfied.
String eTag = getETag(resourceAttributes);
String headerValue = request.getHeader("If-Match");
if (headerValue != null) {
if (headerValue.indexOf('*") == -1) {
StringTokenizer commaTokenizer = new StringTokenizer
(headerValue, ",");
boolean conditionSatisfied = false;
while (!conditionSatisfied && commaTokenizer.hasMoreTokens()) {
String currentToken = commaTokenizer.nextToken();
if (currentToken.trim().equals(eTag))
conditionSatisfied = true;
}
// If none of the given ETags match, 412 Precodition failed is
// sent back
if (!conditionSatisfied) {
response.sendError
(HttpServletResponse.SC_PRECONDITION_FAILED);
return false;
}
}
}
return true;
| | protected boolean | checkIfModifiedSince(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.ResourceAttributes resourceAttributes)Check if the if-modified-since condition is satisfied.
try {
long headerValue = request.getDateHeader("If-Modified-Since");
long lastModified = resourceAttributes.getLastModified();
if (headerValue != -1) {
// If an If-None-Match header has been specified, if modified since
// is ignored.
if ((request.getHeader("If-None-Match") == null)
&& (lastModified < headerValue + 1000)) {
// The entity has not been modified since the date
// specified by the client. This is not an error case.
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
response.setHeader("ETag", getETag(resourceAttributes));
return false;
}
}
} catch (IllegalArgumentException illegalArgument) {
return true;
}
return true;
| | protected boolean | checkIfNoneMatch(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.ResourceAttributes resourceAttributes)Check if the if-none-match condition is satisfied.
String eTag = getETag(resourceAttributes);
String headerValue = request.getHeader("If-None-Match");
if (headerValue != null) {
boolean conditionSatisfied = false;
if (!headerValue.equals("*")) {
StringTokenizer commaTokenizer =
new StringTokenizer(headerValue, ",");
while (!conditionSatisfied && commaTokenizer.hasMoreTokens()) {
String currentToken = commaTokenizer.nextToken();
if (currentToken.trim().equals(eTag))
conditionSatisfied = true;
}
} else {
conditionSatisfied = true;
}
if (conditionSatisfied) {
// For GET and HEAD, we should respond with
// 304 Not Modified.
// For every other method, 412 Precondition Failed is sent
// back.
if ( ("GET".equals(request.getMethod()))
|| ("HEAD".equals(request.getMethod())) ) {
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
response.setHeader("ETag", getETag(resourceAttributes));
return false;
} else {
response.sendError
(HttpServletResponse.SC_PRECONDITION_FAILED);
return false;
}
}
}
return true;
| | protected boolean | checkIfUnmodifiedSince(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.ResourceAttributes resourceAttributes)Check if the if-unmodified-since condition is satisfied.
try {
long lastModified = resourceAttributes.getLastModified();
long headerValue = request.getDateHeader("If-Unmodified-Since");
if (headerValue != -1) {
if ( lastModified >= (headerValue + 1000)) {
// The entity has not been modified since the date
// specified by the client. This is not an error case.
response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
return false;
}
}
} catch(IllegalArgumentException illegalArgument) {
return true;
}
return true;
| | protected boolean | checkSendfile(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.CacheEntry entry, long length, org.apache.catalina.servlets.DefaultServlet$Range range)Check if sendfile can be used.
if ((sendfileSize > 0)
&& (entry.resource != null)
&& ((length > sendfileSize) || (entry.resource.getContent() == null))
&& (entry.attributes.getCanonicalPath() != null)
&& (Boolean.TRUE == request.getAttribute("org.apache.tomcat.sendfile.support"))
&& (request.getClass().getName().equals("org.apache.catalina.connector.RequestFacade"))
&& (response.getClass().getName().equals("org.apache.catalina.connector.ResponseFacade"))) {
request.setAttribute("org.apache.tomcat.sendfile.filename", entry.attributes.getCanonicalPath());
if (range == null) {
request.setAttribute("org.apache.tomcat.sendfile.start", new Long(0L));
request.setAttribute("org.apache.tomcat.sendfile.end", new Long(length));
} else {
request.setAttribute("org.apache.tomcat.sendfile.start", new Long(range.start));
request.setAttribute("org.apache.tomcat.sendfile.end", new Long(range.end + 1));
}
request.setAttribute("org.apache.tomcat.sendfile.token", this);
return true;
} else {
return false;
}
| | protected void | copy(org.apache.naming.resources.CacheEntry cacheEntry, java.io.InputStream is, javax.servlet.ServletOutputStream ostream)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
IOException exception = null;
InputStream resourceInputStream = null;
// Optimization: If the binary content has already been loaded, send
// it directly
if (cacheEntry.resource != null) {
byte buffer[] = cacheEntry.resource.getContent();
if (buffer != null) {
ostream.write(buffer, 0, buffer.length);
return;
}
resourceInputStream = cacheEntry.resource.streamContent();
} else {
resourceInputStream = is;
}
InputStream istream = new BufferedInputStream
(resourceInputStream, input);
// Copy the input stream to the output stream
exception = copyRange(istream, ostream);
// Clean up the input stream
istream.close();
// Rethrow any exception that has occurred
if (exception != null)
throw exception;
| | protected void | copy(org.apache.naming.resources.CacheEntry cacheEntry, java.io.InputStream is, java.io.PrintWriter writer)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
IOException exception = null;
InputStream resourceInputStream = null;
if (cacheEntry.resource != null) {
resourceInputStream = cacheEntry.resource.streamContent();
} else {
resourceInputStream = is;
}
Reader reader;
if (fileEncoding == null) {
reader = new InputStreamReader(resourceInputStream);
} else {
reader = new InputStreamReader(resourceInputStream,
fileEncoding);
}
// Copy the input stream to the output stream
exception = copyRange(reader, writer);
// Clean up the reader
reader.close();
// Rethrow any exception that has occurred
if (exception != null)
throw exception;
| | protected void | copy(org.apache.naming.resources.CacheEntry cacheEntry, javax.servlet.ServletOutputStream ostream, org.apache.catalina.servlets.DefaultServlet$Range range)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
IOException exception = null;
InputStream resourceInputStream = cacheEntry.resource.streamContent();
InputStream istream =
new BufferedInputStream(resourceInputStream, input);
exception = copyRange(istream, ostream, range.start, range.end);
// Clean up the input stream
istream.close();
// Rethrow any exception that has occurred
if (exception != null)
throw exception;
| | protected void | copy(org.apache.naming.resources.CacheEntry cacheEntry, java.io.PrintWriter writer, org.apache.catalina.servlets.DefaultServlet$Range range)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
IOException exception = null;
InputStream resourceInputStream = cacheEntry.resource.streamContent();
Reader reader;
if (fileEncoding == null) {
reader = new InputStreamReader(resourceInputStream);
} else {
reader = new InputStreamReader(resourceInputStream,
fileEncoding);
}
exception = copyRange(reader, writer, range.start, range.end);
// Clean up the input stream
reader.close();
// Rethrow any exception that has occurred
if (exception != null)
throw exception;
| | protected void | copy(org.apache.naming.resources.CacheEntry cacheEntry, javax.servlet.ServletOutputStream ostream, java.util.Iterator ranges, java.lang.String contentType)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
IOException exception = null;
while ( (exception == null) && (ranges.hasNext()) ) {
InputStream resourceInputStream = cacheEntry.resource.streamContent();
InputStream istream =
new BufferedInputStream(resourceInputStream, input);
Range currentRange = (Range) ranges.next();
// Writing MIME header.
ostream.println();
ostream.println("--" + mimeSeparation);
if (contentType != null)
ostream.println("Content-Type: " + contentType);
ostream.println("Content-Range: bytes " + currentRange.start
+ "-" + currentRange.end + "/"
+ currentRange.length);
ostream.println();
// Printing content
exception = copyRange(istream, ostream, currentRange.start,
currentRange.end);
istream.close();
}
ostream.println();
ostream.print("--" + mimeSeparation + "--");
// Rethrow any exception that has occurred
if (exception != null)
throw exception;
| | protected void | copy(org.apache.naming.resources.CacheEntry cacheEntry, java.io.PrintWriter writer, java.util.Iterator ranges, java.lang.String contentType)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
IOException exception = null;
while ( (exception == null) && (ranges.hasNext()) ) {
InputStream resourceInputStream = cacheEntry.resource.streamContent();
Reader reader;
if (fileEncoding == null) {
reader = new InputStreamReader(resourceInputStream);
} else {
reader = new InputStreamReader(resourceInputStream,
fileEncoding);
}
Range currentRange = (Range) ranges.next();
// Writing MIME header.
writer.println();
writer.println("--" + mimeSeparation);
if (contentType != null)
writer.println("Content-Type: " + contentType);
writer.println("Content-Range: bytes " + currentRange.start
+ "-" + currentRange.end + "/"
+ currentRange.length);
writer.println();
// Printing content
exception = copyRange(reader, writer, currentRange.start,
currentRange.end);
reader.close();
}
writer.println();
writer.print("--" + mimeSeparation + "--");
// Rethrow any exception that has occurred
if (exception != null)
throw exception;
| | protected java.io.IOException | copyRange(java.io.InputStream istream, javax.servlet.ServletOutputStream ostream)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
// Copy the input stream to the output stream
IOException exception = null;
byte buffer[] = new byte[input];
int len = buffer.length;
while (true) {
try {
len = istream.read(buffer);
if (len == -1)
break;
ostream.write(buffer, 0, len);
} catch (IOException e) {
exception = e;
len = -1;
break;
}
}
return exception;
| | protected java.io.IOException | copyRange(java.io.Reader reader, java.io.PrintWriter writer)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
// Copy the input stream to the output stream
IOException exception = null;
char buffer[] = new char[input];
int len = buffer.length;
while (true) {
try {
len = reader.read(buffer);
if (len == -1)
break;
writer.write(buffer, 0, len);
} catch (IOException e) {
exception = e;
len = -1;
break;
}
}
return exception;
| | protected java.io.IOException | copyRange(java.io.InputStream istream, javax.servlet.ServletOutputStream ostream, long start, long end)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
if (debug > 10)
log("Serving bytes:" + start + "-" + end);
try {
istream.skip(start);
} catch (IOException e) {
return e;
}
IOException exception = null;
long bytesToRead = end - start + 1;
byte buffer[] = new byte[input];
int len = buffer.length;
while ( (bytesToRead > 0) && (len >= buffer.length)) {
try {
len = istream.read(buffer);
if (bytesToRead >= len) {
ostream.write(buffer, 0, len);
bytesToRead -= len;
} else {
ostream.write(buffer, 0, (int) bytesToRead);
bytesToRead = 0;
}
} catch (IOException e) {
exception = e;
len = -1;
}
if (len < buffer.length)
break;
}
return exception;
| | protected java.io.IOException | copyRange(java.io.Reader reader, java.io.PrintWriter writer, long start, long end)Copy the contents of the specified input stream to the specified
output stream, and ensure that both streams are closed before returning
(even in the face of an exception).
try {
reader.skip(start);
} catch (IOException e) {
return e;
}
IOException exception = null;
long bytesToRead = end - start + 1;
char buffer[] = new char[input];
int len = buffer.length;
while ( (bytesToRead > 0) && (len >= buffer.length)) {
try {
len = reader.read(buffer);
if (bytesToRead >= len) {
writer.write(buffer, 0, len);
bytesToRead -= len;
} else {
writer.write(buffer, 0, (int) bytesToRead);
bytesToRead = 0;
}
} catch (IOException e) {
exception = e;
len = -1;
}
if (len < buffer.length)
break;
}
return exception;
| | public void | destroy()Finalize this servlet.
// --------------------------------------------------------- Public Methods
| | protected void | displaySize(java.lang.StringBuffer buf, int filesize)Display the size of a file.
int leftside = filesize / 1024;
int rightside = (filesize % 1024) / 103; // makes 1 digit
// To avoid 0.0 for non-zero file, we bump to 0.1
if (leftside == 0 && rightside == 0 && filesize != 0)
rightside = 1;
buf.append(leftside).append(".").append(rightside);
buf.append(" KB");
| | protected void | doDelete(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)Process a POST request for the specified resource.
if (readOnly) {
resp.sendError(HttpServletResponse.SC_FORBIDDEN);
return;
}
String path = getRelativePath(req);
boolean exists = true;
try {
resources.lookup(path);
} catch (NamingException e) {
exists = false;
}
if (exists) {
boolean result = true;
try {
resources.unbind(path);
} catch (NamingException e) {
result = false;
}
if (result) {
resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
} else {
resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
}
} else {
resp.sendError(HttpServletResponse.SC_NOT_FOUND);
}
| | protected void | doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)Process a GET request for the specified resource.
// Serve the requested resource, including the data content
serveResource(request, response, true);
| | protected void | doHead(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)Process a HEAD request for the specified resource.
// Serve the requested resource, without the data content
serveResource(request, response, false);
| | protected void | doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)Process a POST request for the specified resource.
doGet(request, response);
| | protected void | doPut(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)Process a POST request for the specified resource.
if (readOnly) {
resp.sendError(HttpServletResponse.SC_FORBIDDEN);
return;
}
String path = getRelativePath(req);
boolean exists = true;
try {
resources.lookup(path);
} catch (NamingException e) {
exists = false;
}
boolean result = true;
// Temp. content file used to support partial PUT
File contentFile = null;
Range range = parseContentRange(req, resp);
InputStream resourceInputStream = null;
// Append data specified in ranges to existing content for this
// resource - create a temp. file on the local filesystem to
// perform this operation
// Assume just one range is specified for now
if (range != null) {
contentFile = executePartialPut(req, range, path);
resourceInputStream = new FileInputStream(contentFile);
} else {
resourceInputStream = req.getInputStream();
}
try {
Resource newResource = new Resource(resourceInputStream);
// FIXME: Add attributes
if (exists) {
resources.rebind(path, newResource);
} else {
resources.bind(path, newResource);
}
} catch(NamingException e) {
result = false;
}
if (result) {
if (exists) {
resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
} else {
resp.setStatus(HttpServletResponse.SC_CREATED);
}
} else {
resp.sendError(HttpServletResponse.SC_CONFLICT);
}
| | protected java.io.File | executePartialPut(javax.servlet.http.HttpServletRequest req, org.apache.catalina.servlets.DefaultServlet$Range range, java.lang.String path)Handle a partial PUT. New content specified in request is appended to
existing content in oldRevisionContent (if present). This code does
not support simultaneous partial updates to the same resource.
// Append data specified in ranges to existing content for this
// resource - create a temp. file on the local filesystem to
// perform this operation
File tempDir = (File) getServletContext().getAttribute
("javax.servlet.context.tempdir");
// Convert all '/' characters to '.' in resourcePath
String convertedResourcePath = path.replace('/", '.");
File contentFile = new File(tempDir, convertedResourcePath);
if (contentFile.createNewFile()) {
// Clean up contentFile when Tomcat is terminated
contentFile.deleteOnExit();
}
RandomAccessFile randAccessContentFile =
new RandomAccessFile(contentFile, "rw");
Resource oldResource = null;
try {
Object obj = resources.lookup(path);
if (obj instanceof Resource)
oldResource = (Resource) obj;
} catch (NamingException e) {
;
}
// Copy data in oldRevisionContent to contentFile
if (oldResource != null) {
BufferedInputStream bufOldRevStream =
new BufferedInputStream(oldResource.streamContent(),
BUFFER_SIZE);
int numBytesRead;
byte[] copyBuffer = new byte[BUFFER_SIZE];
while ((numBytesRead = bufOldRevStream.read(copyBuffer)) != -1) {
randAccessContentFile.write(copyBuffer, 0, numBytesRead);
}
bufOldRevStream.close();
}
randAccessContentFile.setLength(range.length);
// Append data in request input stream to contentFile
randAccessContentFile.seek(range.start);
int numBytesRead;
byte[] transferBuffer = new byte[BUFFER_SIZE];
BufferedInputStream requestBufInStream =
new BufferedInputStream(req.getInputStream(), BUFFER_SIZE);
while ((numBytesRead = requestBufInStream.read(transferBuffer)) != -1) {
randAccessContentFile.write(transferBuffer, 0, numBytesRead);
}
randAccessContentFile.close();
requestBufInStream.close();
return contentFile;
| | protected java.io.InputStream | findXsltInputStream(javax.naming.directory.DirContext directory)Return the xsl template inputstream (if possible)
if (localXsltFile != null) {
try {
Object obj = directory.lookup(localXsltFile);
if ((obj != null) && (obj instanceof Resource)) {
InputStream is = ((Resource) obj).streamContent();
if (is != null)
return is;
}
} catch (NamingException e) {
throw new ServletException("Error opening XSLT resource", e);
}
}
/* Open and read in file in one fell swoop to reduce chance
* chance of leaving handle open.
*/
if (globalXsltFile!=null) {
FileInputStream fis = null;
try {
File f = new File(globalXsltFile);
if (f.exists()){
fis =new FileInputStream(f);
byte b[] = new byte[(int)f.length()]; /* danger! */
fis.read(b);
return new ByteArrayInputStream(b);
}
} finally {
if (fis!=null)
fis.close();
}
}
return null;
| | protected java.lang.String | getETag(org.apache.naming.resources.ResourceAttributes resourceAttributes)Get the ETag associated with a file.
String result = null;
if ((result = resourceAttributes.getETag(true)) != null) {
return result;
} else if ((result = resourceAttributes.getETag()) != null) {
return result;
} else {
return "W/\"" + resourceAttributes.getContentLength() + "-"
+ resourceAttributes.getLastModified() + "\"";
}
| | protected java.lang.String | getReadme(javax.naming.directory.DirContext directory)Get the readme file as a string.
if (readmeFile != null) {
try {
Object obj = directory.lookup(readmeFile);
if ((obj != null) && (obj instanceof Resource)) {
StringWriter buffer = new StringWriter();
InputStream is = ((Resource) obj).streamContent();
copyRange(new InputStreamReader(is),
new PrintWriter(buffer));
return buffer.toString();
}
} catch (NamingException e) {
throw new ServletException("Error opening readme resource", e);
}
}
return null;
| | protected java.lang.String | getRelativePath(javax.servlet.http.HttpServletRequest request)Return the relative path associated with this servlet.
// Are we being processed by a RequestDispatcher.include()?
if (request.getAttribute(Globals.INCLUDE_REQUEST_URI_ATTR) != null) {
String result = (String) request.getAttribute(
Globals.INCLUDE_PATH_INFO_ATTR);
if (result == null)
result = (String) request.getAttribute(
Globals.INCLUDE_SERVLET_PATH_ATTR);
if ((result == null) || (result.equals("")))
result = "/";
return (result);
}
// No, extract the desired path directly from the request
String result = request.getPathInfo();
if (result == null) {
result = request.getServletPath();
}
if ((result == null) || (result.equals(""))) {
result = "/";
}
return (result);
| | public void | init()Initialize this servlet.
if (getServletConfig().getInitParameter("debug") != null)
debug = Integer.parseInt(getServletConfig().getInitParameter("debug"));
if (getServletConfig().getInitParameter("input") != null)
input = Integer.parseInt(getServletConfig().getInitParameter("input"));
if (getServletConfig().getInitParameter("output") != null)
output = Integer.parseInt(getServletConfig().getInitParameter("output"));
listings = Boolean.parseBoolean(getServletConfig().getInitParameter("listings"));
if (getServletConfig().getInitParameter("readonly") != null)
readOnly = Boolean.parseBoolean(getServletConfig().getInitParameter("readonly"));
if (getServletConfig().getInitParameter("sendfileSize") != null)
sendfileSize =
Integer.parseInt(getServletConfig().getInitParameter("sendfileSize")) * 1024;
fileEncoding = getServletConfig().getInitParameter("fileEncoding");
globalXsltFile = getServletConfig().getInitParameter("globalXsltFile");
localXsltFile = getServletConfig().getInitParameter("localXsltFile");
readmeFile = getServletConfig().getInitParameter("readmeFile");
// Sanity check on the specified buffer sizes
if (input < 256)
input = 256;
if (output < 256)
output = 256;
if (debug > 0) {
log("DefaultServlet.init: input buffer size=" + input +
", output buffer size=" + output);
}
// Load the proxy dir context.
resources = (ProxyDirContext) getServletContext()
.getAttribute(Globals.RESOURCES_ATTR);
if (resources == null) {
try {
resources =
(ProxyDirContext) new InitialContext()
.lookup(RESOURCES_JNDI_NAME);
} catch (NamingException e) {
// Failed
throw new ServletException("No resources", e);
}
}
if (resources == null) {
throw new UnavailableException("No resources");
}
| | protected org.apache.catalina.servlets.DefaultServlet$Range | parseContentRange(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)Parse the content-range header.
// Retrieving the content-range header (if any is specified
String rangeHeader = request.getHeader("Content-Range");
if (rangeHeader == null)
return null;
// bytes is the only range unit supported
if (!rangeHeader.startsWith("bytes")) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
return null;
}
rangeHeader = rangeHeader.substring(6).trim();
int dashPos = rangeHeader.indexOf('-");
int slashPos = rangeHeader.indexOf('/");
if (dashPos == -1) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
return null;
}
if (slashPos == -1) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
return null;
}
Range range = new Range();
try {
range.start = Long.parseLong(rangeHeader.substring(0, dashPos));
range.end =
Long.parseLong(rangeHeader.substring(dashPos + 1, slashPos));
range.length = Long.parseLong
(rangeHeader.substring(slashPos + 1, rangeHeader.length()));
} catch (NumberFormatException e) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
return null;
}
if (!range.validate()) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
return null;
}
return range;
| | protected java.util.ArrayList | parseRange(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, org.apache.naming.resources.ResourceAttributes resourceAttributes)Parse the range header.
// Checking If-Range
String headerValue = request.getHeader("If-Range");
if (headerValue != null) {
long headerValueTime = (-1L);
try {
headerValueTime = request.getDateHeader("If-Range");
} catch (IllegalArgumentException e) {
;
}
String eTag = getETag(resourceAttributes);
long lastModified = resourceAttributes.getLastModified();
if (headerValueTime == (-1L)) {
// If the ETag the client gave does not match the entity
// etag, then the entire entity is returned.
if (!eTag.equals(headerValue.trim()))
return FULL;
} else {
// If the timestamp of the entity the client got is older than
// the last modification date of the entity, the entire entity
// is returned.
if (lastModified > (headerValueTime + 1000))
return FULL;
}
}
long fileLength = resourceAttributes.getContentLength();
if (fileLength == 0)
return null;
// Retrieving the range header (if any is specified
String rangeHeader = request.getHeader("Range");
if (rangeHeader == null)
return null;
// bytes is the only range unit supported (and I don't see the point
// of adding new ones).
if (!rangeHeader.startsWith("bytes")) {
response.addHeader("Content-Range", "bytes */" + fileLength);
response.sendError
(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
return null;
}
rangeHeader = rangeHeader.substring(6);
// Vector which will contain all the ranges which are successfully
// parsed.
ArrayList<Range> result = new ArrayList<Range>();
StringTokenizer commaTokenizer = new StringTokenizer(rangeHeader, ",");
// Parsing the range list
while (commaTokenizer.hasMoreTokens()) {
String rangeDefinition = commaTokenizer.nextToken().trim();
Range currentRange = new Range();
currentRange.length = fileLength;
int dashPos = rangeDefinition.indexOf('-");
if (dashPos == -1) {
response.addHeader("Content-Range", "bytes */" + fileLength);
response.sendError
(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
return null;
}
if (dashPos == 0) {
try {
long offset = Long.parseLong(rangeDefinition);
currentRange.start = fileLength + offset;
currentRange.end = fileLength - 1;
} catch (NumberFormatException e) {
response.addHeader("Content-Range",
"bytes */" + fileLength);
response.sendError
(HttpServletResponse
.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
return null;
}
} else {
try {
currentRange.start = Long.parseLong
(rangeDefinition.substring(0, dashPos));
if (dashPos < rangeDefinition.length() - 1)
currentRange.end = Long.parseLong
(rangeDefinition.substring
(dashPos + 1, rangeDefinition.length()));
else
currentRange.end = fileLength - 1;
} catch (NumberFormatException e) {
response.addHeader("Content-Range",
"bytes */" + fileLength);
response.sendError
(HttpServletResponse
.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
return null;
}
}
if (!currentRange.validate()) {
response.addHeader("Content-Range", "bytes */" + fileLength);
response.sendError
(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
return null;
}
result.add(currentRange);
}
return result;
| | protected java.io.InputStream | render(java.lang.String contextPath, org.apache.naming.resources.CacheEntry cacheEntry)Decide which way to render. HTML or XML.
InputStream xsltInputStream =
findXsltInputStream(cacheEntry.context);
if (xsltInputStream==null) {
return renderHtml(contextPath, cacheEntry);
} else {
return renderXml(contextPath, cacheEntry, xsltInputStream);
}
| | protected java.io.InputStream | renderHtml(java.lang.String contextPath, org.apache.naming.resources.CacheEntry cacheEntry)Return an InputStream to an HTML representation of the contents
of this directory.
String name = cacheEntry.name;
// Number of characters to trim from the beginnings of filenames
int trim = name.length();
if (!name.endsWith("/"))
trim += 1;
if (name.equals("/"))
trim = 1;
// Prepare a writer to a buffered area
ByteArrayOutputStream stream = new ByteArrayOutputStream();
OutputStreamWriter osWriter = new OutputStreamWriter(stream, "UTF8");
PrintWriter writer = new PrintWriter(osWriter);
StringBuffer sb = new StringBuffer();
// rewriteUrl(contextPath) is expensive. cache result for later reuse
String rewrittenContextPath = rewriteUrl(contextPath);
// Render the page header
sb.append("<html>\r\n");
sb.append("<head>\r\n");
sb.append("<title>");
sb.append(sm.getString("directory.title", name));
sb.append("</title>\r\n");
sb.append("<STYLE><!--");
sb.append(org.apache.catalina.util.TomcatCSS.TOMCAT_CSS);
sb.append("--></STYLE> ");
sb.append("</head>\r\n");
sb.append("<body>");
sb.append("<h1>");
sb.append(sm.getString("directory.title", name));
// Render the link to our parent (if required)
String parentDirectory = name;
if (parentDirectory.endsWith("/")) {
parentDirectory =
parentDirectory.substring(0, parentDirectory.length() - 1);
}
int slash = parentDirectory.lastIndexOf('/");
if (slash >= 0) {
String parent = name.substring(0, slash);
sb.append(" - <a href=\"");
sb.append(rewrittenContextPath);
if (parent.equals(""))
parent = "/";
sb.append(rewriteUrl(parent));
if (!parent.endsWith("/"))
sb.append("/");
sb.append("\">");
sb.append("<b>");
sb.append(sm.getString("directory.parent", parent));
sb.append("</b>");
sb.append("</a>");
}
sb.append("</h1>");
sb.append("<HR size=\"1\" noshade=\"noshade\">");
sb.append("<table width=\"100%\" cellspacing=\"0\"" +
" cellpadding=\"5\" align=\"center\">\r\n");
// Render the column headings
sb.append("<tr>\r\n");
sb.append("<td align=\"left\"><font size=\"+1\"><strong>");
sb.append(sm.getString("directory.filename"));
sb.append("</strong></font></td>\r\n");
sb.append("<td align=\"center\"><font size=\"+1\"><strong>");
sb.append(sm.getString("directory.size"));
sb.append("</strong></font></td>\r\n");
sb.append("<td align=\"right\"><font size=\"+1\"><strong>");
sb.append(sm.getString("directory.lastModified"));
sb.append("</strong></font></td>\r\n");
sb.append("</tr>");
try {
// Render the directory entries within this directory
NamingEnumeration enumeration = resources.list(cacheEntry.name);
boolean shade = false;
while (enumeration.hasMoreElements()) {
NameClassPair ncPair = (NameClassPair) enumeration.nextElement();
String resourceName = ncPair.getName();
String trimmed = resourceName/*.substring(trim)*/;
if (trimmed.equalsIgnoreCase("WEB-INF") ||
trimmed.equalsIgnoreCase("META-INF"))
continue;
CacheEntry childCacheEntry =
resources.lookupCache(cacheEntry.name + resourceName);
if (!childCacheEntry.exists) {
continue;
}
sb.append("<tr");
if (shade)
sb.append(" bgcolor=\"#eeeeee\"");
sb.append(">\r\n");
shade = !shade;
sb.append("<td align=\"left\"> \r\n");
sb.append("<a href=\"");
sb.append(rewrittenContextPath);
resourceName = rewriteUrl(name + resourceName);
sb.append(resourceName);
if (childCacheEntry.context != null)
sb.append("/");
sb.append("\"><tt>");
sb.append(RequestUtil.filter(trimmed));
if (childCacheEntry.context != null)
sb.append("/");
sb.append("</tt></a></td>\r\n");
sb.append("<td align=\"right\"><tt>");
if (childCacheEntry.context != null)
sb.append(" ");
else
sb.append(renderSize(childCacheEntry.attributes.getContentLength()));
sb.append("</tt></td>\r\n");
sb.append("<td align=\"right\"><tt>");
sb.append(childCacheEntry.attributes.getLastModifiedHttp());
sb.append("</tt></td>\r\n");
sb.append("</tr>\r\n");
}
} catch (NamingException e) {
// Something went wrong
throw new ServletException("Error accessing resource", e);
}
// Render the page footer
sb.append("</table>\r\n");
sb.append("<HR size=\"1\" noshade=\"noshade\">");
String readme = getReadme(cacheEntry.context);
if (readme!=null) {
sb.append(readme);
sb.append("<HR size=\"1\" noshade=\"noshade\">");
}
sb.append("<h3>").append(ServerInfo.getServerInfo()).append("</h3>");
sb.append("</body>\r\n");
sb.append("</html>\r\n");
// Return an input stream to the underlying bytes
writer.write(sb.toString());
writer.flush();
return (new ByteArrayInputStream(stream.toByteArray()));
| | protected java.lang.String | renderSize(long size)Render the specified file size (in bytes).
long leftSide = size / 1024;
long rightSide = (size % 1024) / 103; // Makes 1 digit
if ((leftSide == 0) && (rightSide == 0) && (size > 0))
rightSide = 1;
return ("" + leftSide + "." + rightSide + " kb");
| | protected java.io.InputStream | renderXml(java.lang.String contextPath, org.apache.naming.resources.CacheEntry cacheEntry, java.io.InputStream xsltInputStream)Return an InputStream to an HTML representation of the contents
of this directory.
StringBuffer sb = new StringBuffer();
sb.append("<?xml version=\"1.0\"?>");
sb.append("<listing ");
sb.append(" contextPath='");
sb.append(contextPath);
sb.append("'");
sb.append(" directory='");
sb.append(cacheEntry.name);
sb.append("' ");
sb.append(" hasParent='").append(!cacheEntry.name.equals("/"));
sb.append("'>");
sb.append("<entries>");
try {
// Render the directory entries within this directory
NamingEnumeration enumeration = resources.list(cacheEntry.name);
// rewriteUrl(contextPath) is expensive. cache result for later reuse
String rewrittenContextPath = rewriteUrl(contextPath);
while (enumeration.hasMoreElements()) {
NameClassPair ncPair = (NameClassPair) enumeration.nextElement();
String resourceName = ncPair.getName();
String trimmed = resourceName/*.substring(trim)*/;
if (trimmed.equalsIgnoreCase("WEB-INF") ||
trimmed.equalsIgnoreCase("META-INF") ||
trimmed.equalsIgnoreCase(localXsltFile))
continue;
CacheEntry childCacheEntry =
resources.lookupCache(cacheEntry.name + resourceName);
if (!childCacheEntry.exists) {
continue;
}
sb.append("<entry");
sb.append(" type='")
.append((childCacheEntry.context != null)?"dir":"file")
.append("'");
sb.append(" urlPath='")
.append(rewrittenContextPath)
.append(rewriteUrl(cacheEntry.name + resourceName))
.append((childCacheEntry.context != null)?"/":"")
.append("'");
if (childCacheEntry.resource != null) {
sb.append(" size='")
.append(renderSize(childCacheEntry.attributes.getContentLength()))
.append("'");
}
sb.append(" date='")
.append(childCacheEntry.attributes.getLastModifiedHttp())
.append("'");
sb.append(">");
sb.append(RequestUtil.filter(trimmed));
if (childCacheEntry.context != null)
sb.append("/");
sb.append("</entry>");
}
} catch (NamingException e) {
// Something went wrong
throw new ServletException("Error accessing resource", e);
}
sb.append("</entries>");
String readme = getReadme(cacheEntry.context);
if (readme!=null) {
sb.append("<readme><![CDATA[");
sb.append(readme);
sb.append("]]></readme>");
}
sb.append("</listing>");
try {
TransformerFactory tFactory = TransformerFactory.newInstance();
Source xmlSource = new StreamSource(new StringReader(sb.toString()));
Source xslSource = new StreamSource(xsltInputStream);
Transformer transformer = tFactory.newTransformer(xslSource);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
OutputStreamWriter osWriter = new OutputStreamWriter(stream, "UTF8");
StreamResult out = new StreamResult(osWriter);
transformer.transform(xmlSource, out);
osWriter.flush();
return (new ByteArrayInputStream(stream.toByteArray()));
} catch (TransformerException e) {
throw new ServletException("XSL transformer error", e);
}
| | protected java.lang.String | rewriteUrl(java.lang.String path)URL rewriter.
return urlEncoder.encode( path );
| | protected void | serveResource(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, boolean content)Serve the specified resource, optionally including the data content.
// Identify the requested resource path
String path = getRelativePath(request);
if (debug > 0) {
if (content)
log("DefaultServlet.serveResource: Serving resource '" +
path + "' headers and data");
else
log("DefaultServlet.serveResource: Serving resource '" +
path + "' headers only");
}
CacheEntry cacheEntry = resources.lookupCache(path);
if (!cacheEntry.exists) {
// Check if we're included so we can return the appropriate
// missing resource name in the error
String requestUri = (String) request.getAttribute(
Globals.INCLUDE_REQUEST_URI_ATTR);
if (requestUri == null) {
requestUri = request.getRequestURI();
} else {
// We're included, and the response.sendError() below is going
// to be ignored by the resource that is including us.
// Therefore, the only way we can let the including resource
// know is by including warning message in response
response.getWriter().write(
sm.getString("defaultServlet.missingResource",
requestUri));
}
response.sendError(HttpServletResponse.SC_NOT_FOUND,
requestUri);
return;
}
// If the resource is not a collection, and the resource path
// ends with "/" or "\", return NOT FOUND
if (cacheEntry.context == null) {
if (path.endsWith("/") || (path.endsWith("\\"))) {
// Check if we're included so we can return the appropriate
// missing resource name in the error
String requestUri = (String) request.getAttribute(
Globals.INCLUDE_REQUEST_URI_ATTR);
if (requestUri == null) {
requestUri = request.getRequestURI();
}
response.sendError(HttpServletResponse.SC_NOT_FOUND,
requestUri);
return;
}
}
// Check if the conditions specified in the optional If headers are
// satisfied.
if (cacheEntry.context == null) {
// Checking If headers
boolean included =
(request.getAttribute(Globals.INCLUDE_CONTEXT_PATH_ATTR) != null);
if (!included
&& !checkIfHeaders(request, response, cacheEntry.attributes)) {
return;
}
}
// Find content type.
String contentType = cacheEntry.attributes.getMimeType();
if (contentType == null) {
contentType = getServletContext().getMimeType(cacheEntry.name);
cacheEntry.attributes.setMimeType(contentType);
}
ArrayList ranges = null;
long contentLength = -1L;
if (cacheEntry.context != null) {
// Skip directory listings if we have been configured to
// suppress them
if (!listings) {
response.sendError(HttpServletResponse.SC_NOT_FOUND,
request.getRequestURI());
return;
}
contentType = "text/html;charset=UTF-8";
} else {
// Parse range specifier
ranges = parseRange(request, response, cacheEntry.attributes);
// ETag header
response.setHeader("ETag", getETag(cacheEntry.attributes));
// Last-Modified header
response.setHeader("Last-Modified",
cacheEntry.attributes.getLastModifiedHttp());
// Get content length
contentLength = cacheEntry.attributes.getContentLength();
// Special case for zero length files, which would cause a
// (silent) ISE when setting the output buffer size
if (contentLength == 0L) {
content = false;
}
}
ServletOutputStream ostream = null;
PrintWriter writer = null;
if (content) {
// Trying to retrieve the servlet output stream
try {
ostream = response.getOutputStream();
} catch (IllegalStateException e) {
// If it fails, we try to get a Writer instead if we're
// trying to serve a text file
if ( (contentType == null)
|| (contentType.startsWith("text"))
|| (contentType.endsWith("xml")) ) {
writer = response.getWriter();
} else {
throw e;
}
}
}
if ( (cacheEntry.context != null)
|| ( ((ranges == null) || (ranges.isEmpty()))
&& (request.getHeader("Range") == null) )
|| (ranges == FULL) ) {
// Set the appropriate output headers
if (contentType != null) {
if (debug > 0)
log("DefaultServlet.serveFile: contentType='" +
contentType + "'");
response.setContentType(contentType);
}
if ((cacheEntry.resource != null) && (contentLength >= 0)) {
if (debug > 0)
log("DefaultServlet.serveFile: contentLength=" +
contentLength);
if (contentLength < Integer.MAX_VALUE) {
response.setContentLength((int) contentLength);
} else {
// Set the content-length as String to be able to use a long
response.setHeader("content-length", "" + contentLength);
}
}
InputStream renderResult = null;
if (cacheEntry.context != null) {
if (content) {
// Serve the directory browser
renderResult =
render(request.getContextPath(), cacheEntry);
}
}
// Copy the input stream to our output stream (if requested)
if (content) {
try {
response.setBufferSize(output);
} catch (IllegalStateException e) {
// Silent catch
}
if (ostream != null) {
if (!checkSendfile(request, response, cacheEntry, contentLength, null))
copy(cacheEntry, renderResult, ostream);
} else {
copy(cacheEntry, renderResult, writer);
}
}
} else {
if ((ranges == null) || (ranges.isEmpty()))
return;
// Partial content response.
response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
if (ranges.size() == 1) {
Range range = (Range) ranges.get(0);
response.addHeader("Content-Range", "bytes "
+ range.start
+ "-" + range.end + "/"
+ range.length);
long length = range.end - range.start + 1;
if (length < Integer.MAX_VALUE) {
response.setContentLength((int) length);
} else {
// Set the content-length as String to be able to use a long
response.setHeader("content-length", "" + length);
}
if (contentType != null) {
if (debug > 0)
log("DefaultServlet.serveFile: contentType='" +
contentType + "'");
response.setContentType(contentType);
}
if (content) {
try {
response.setBufferSize(output);
} catch (IllegalStateException e) {
// Silent catch
}
if (ostream != null) {
if (!checkSendfile(request, response, cacheEntry, range.end - range.start + 1, range))
copy(cacheEntry, ostream, range);
} else {
copy(cacheEntry, writer, range);
}
}
} else {
response.setContentType("multipart/byteranges; boundary="
+ mimeSeparation);
if (content) {
try {
response.setBufferSize(output);
} catch (IllegalStateException e) {
// Silent catch
}
if (ostream != null) {
copy(cacheEntry, ostream, ranges.iterator(),
contentType);
} else {
copy(cacheEntry, writer, ranges.iterator(),
contentType);
}
}
}
}
|
|
